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WO2007143333A1 - Procédé de fabrication de clinker de ciment - Google Patents

Procédé de fabrication de clinker de ciment Download PDF

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Publication number
WO2007143333A1
WO2007143333A1 PCT/US2007/068765 US2007068765W WO2007143333A1 WO 2007143333 A1 WO2007143333 A1 WO 2007143333A1 US 2007068765 W US2007068765 W US 2007068765W WO 2007143333 A1 WO2007143333 A1 WO 2007143333A1
Authority
WO
WIPO (PCT)
Prior art keywords
slag
preheater
raw materials
conveying device
cement raw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2007/068765
Other languages
English (en)
Inventor
Jerry Meusel
Thomas W. Lesniak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BULK MATERIALS INTERNATIONAL Co
Original Assignee
BULK MATERIALS INTERNATIONAL Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BULK MATERIALS INTERNATIONAL Co filed Critical BULK MATERIALS INTERNATIONAL Co
Publication of WO2007143333A1 publication Critical patent/WO2007143333A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/14—Cements containing slag
    • C04B7/147—Metallurgical slag
    • C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/2016—Arrangements of preheating devices for the charge
    • F27B7/2025—Arrangements of preheating devices for the charge consisting of a single string of cyclones
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding

Definitions

  • This invention relates to a process of manufacturing cement clinker, and more particularly, to a cement clinker manufacturing process that is carried out in a rotary kiln equipped with a preheater system.
  • Cement clinker is generally produced by the heat treatment, or pyroprocessing, of finely ground cement raw materials in a kiln.
  • a finished cement e.g., a Portland cement, may be manufactured from the cement clinker thus produced by subsequent milling and grinding steps.
  • the raw materials that are pyroprocessed to make cement clinker may include, for example, limestone, clay and sand.
  • One typical clinker production process utilizes a rotary kiln. Finely ground cement raw materials are introduced into the feed end of the kiln. The rotary kiln is inclined so that, as the kiln rotates, the cement raw materials progress along the length of the kiln from the feed end to the output end.
  • cement raw materials progress through the rotary kiln, they are exposed to a temperature gradient from about 100 0 C at the start of the process, up to about 1500 0 C at the hottest point of the rotary kiln.
  • the initial processing at temperatures from about 100 0 C to about 800 0 C, serves a variety of functions, including removal of moisture from the cement raw materials. This portion of the processing is often termed precalcining.
  • evolution of carbon dioxide occurs, e.g., associated with conversion of carbonates such as calcium carbonate and magnesium carbonate to calcium oxide and magnesium oxide respectively.
  • This portion of the pyroprocessing is often termed calcining.
  • the material is further heated from about 1200° to about 1500° in the so-called burning zone of the kiln, and this is where the final stages of clinker compound formation occur.
  • the burning zone of the kiln is often subdivided into an upper transition zone, where both calcination processes and interim phase formations are occurring simultaneously; the sintering zone, where unstable interim phases exothermically transform into more stable compounds; and the cooling zone, where compounds that are partially liquid in the sintering zone are solidified.
  • rotary cement kilns There are at least two different types.
  • One type of rotary kiln is a conventional long, or elongated rotary kiln.
  • the kiln length corresponds to the requirements for completion of a process that begins with introduction of finely ground unprocessed cement raw materials into the feed end of the rotary kiln.
  • the other type of rotary kiln is one equipped with a preheater system, e.g., a preheater optionally equipped with a precalciner.
  • Rotary kilns equipped with preheater systems differ significantly from conventional elongated rotary kilns.
  • kilns equipped with a preheater system are significantly shorter in length than conventional long kilns.
  • the difference in kiln length reflects a fundamental difference in the start-point for pyroprocessing in a rotary kiln equipped with a preheater system.
  • the comparatively shorter kiln length thus relates to the fact that the clinker formation process occurring in the rotary kiln itself begins, not with unprocessed cement raw materials as in a conventional long kiln, but rather with cement raw materials that have already been processed by the preheater system.
  • the portion of the pyroprocessing that is performed in the preheater system is performed in a profoundly different way than the early portion of pyroprocessing accomplished in a conventional elongated rotary kiln. This is primarily because heat exchange is fundamentally different in a preheater than it is inside the rotary kiln itself. Inside an elongated rotary kiln, heat exchange is inefficient because hot gases heat only the surface of the moving bed of material. Conventional elongated kilns are generally fitted with a chain system at the back of the kiln to facilitate heat transfer.
  • a preheater kiln One kind of rotary kiln equipped with a preheater system is a "preheater kiln," wherein the preheater system comprises a preheater, such as for example a suspension preheater.
  • a preheater kiln one or more cyclone-type preheater vessels are connected to the rotary kiln in the gas stream exiting the rotary kiln.
  • Multiple cyclones are typically arranged vertically in series, supported by a structure known as a preheater tower.
  • Preheater kilns are also known as a suspension preheater kilns because the hot exhaust gases from the rotary kiln typically pass countercurrently through the downward moving raw materials in the preheater.
  • the preheater tower is commonly configured with four preheater vessels at different heights in the tower, which are commonly referred to as stages, e.g., Stage 1, Stage 2, etc.
  • a precalciner kiln Another kind of rotary kiln equipped with a preheater system is a "precalciner kiln," wherein the preheater system comprises a preheater, such as for example a suspension preheater, which is equipped with a precalciner.
  • a precalciner kiln is similar to a preheater kiln, and is also typically configured as a multistage preheater tower, most often a four stage preheater tower. However, the precalciner kiln is additionally provided with a precalciner which is typically attached to the lowest stage of the preheater tower.
  • the precalciner typically has a secondary firing system which is independent of the firing system for the rotary kiln itself.
  • Slags have conventionally been a waste material from various metal production processes. Nonferrous slags are produced in a few locations, often remote from potential markets. As a result, they are not well utilized and most of the nonferrous slag produced is disposed of in slag dumps or stockpiles.
  • Steel slag also known as converter slag, includes any type of slag produced during the manufacture of iron based alloys in an iron converter, an open hearth furnace, an electric arc furnace or a basic oxygen furnace. Steel slag is often produced at a steel mill in large, irregularly shaped chunks or pieces.
  • Blast-furnace slag is a nonmetallic product, consisting essentially of silicates and aluminosilicates of calcium and other bases, that is developed in a molten condition simultaneously with iron in a blast furnace.
  • Air-cooled blast furnace slag is the material resulting from solidification of molten blast-furnace slag under atmospheric conditions: subsequent cooling may be accelerated by application of water to the solidified surface.
  • Nonferrous slags are produced during the recovery and processing of nonferrous metal from natural ores.
  • the slags are molten by-products of high temperature processes that are primarily used to separate the metal and nonmetal constituents contained in a bulk ore. When molten slag is cooled, it converts to a rocklike or granular material.
  • Copper and zinc slags are produced by: (1) roasting, in which sulfur in the ore is eliminated as sulfur dioxide (SO 2 ); (2) smelting, in which the roasted product is melted in a siliceous flux and the metal is reduced; and (3) converting, where the melt is desulfurized with lime flux, iron ore, or a basic slag and then oxygen lanced to remove other impurities.
  • Cement clinker production typically requires large amounts of energy and raw materials.
  • Industrial byproducts such as slags can be used to replace a portion of the nonrenewable virgin raw materials such as limestone that are required for clinker production processes.
  • slags have previously been processed at high temperature, there is a substantially lower energy requirement for the further pyroprocessing of the slag in the clinker formation process.
  • blast furnace slag and steel slag have been employed in some cement production processes. Transformation of cement raw materials into cement clinker includes conversion of various metal carbonates to the corresponding metal oxides, thereby producing substantial emissions of carbon dioxide, a well known greenhouse gas.
  • a process for producing cement clinker using a rotary cement kiln that is equipped with a preheater system, e.g., a preheater kiln or a precalciner kiln.
  • the preheater system has a feed end and an outlet end.
  • the outlet end of the preheater system is communicably connected to the feed end of a rotary cement kiln.
  • the process comprises introducing cement raw materials into the preheater system.
  • the cement raw materials include slag having a particle size in the range from about 1 mm up to about 5 cm and non- slag cement raw materials.
  • the preheater system comprises a preheater, e.g., a suspension preheater.
  • the preheater system comprises a preheater equipped with a precalciner.
  • an apparatus for producing cement clinker comprising a rotary cement kiln that is equipped with a preheater system, and a mechanical conveying device for introducing cement raw materials into the preheater system.
  • the cement raw materials include slag having a particle size in the range from about 1 mm up to about 5 cm and finely ground non-slag cement raw materials.
  • the preheater system comprises a preheater, e.g., a suspension preheater.
  • the preheater system comprises a preheater equipped with a precalciner.
  • the mechanical conveying device for introducing cement raw materials into the preheater system is, for example, a belt conveyer, a screw conveyer or a bucket elevator.
  • the mechanical conveying device introduces the slag and the finely ground non-slag cement raw materials into the preheater system.
  • the mechanical conveying device introduces the slag into the preheater, and a pneumatic conveying device introduces finely ground non-slag cement raw materials into the preheater system.
  • the preheater system comprises a preheater equipped with a precalciner, and the mechanical conveying device introduces the slag into the precalciner, and the pneumatic conveying device introduces finely ground non-slag cement raw materials into the feed end of the preheater system.
  • the rotary cement kiln employed in the process and apparatus of the invention is equipped with a preheater system and is accordingly other than a conventional long, or elongated rotary cement kiln.
  • the cement raw materials for use in the apparatus and process of the invention include both slag and non-slag cement raw materials.
  • the slag component of the cement raw materials has a particle size from about 1 mm up to about 5 cm.
  • the non- slag cement raw materials are finely ground.
  • the slag component of the cement raw materials is selected from at least one member of the group consisting of steel slag, air cooled blast furnace slag, copper slag and zinc slag.
  • FIG. Ia is a flowchart representation of one process according to the invention, in which slag having a particle size in the range from about 1 mm to about 5 cm and finely ground non-slag raw materials are both introduced into the feed end of a preheater and the output end of the preheater is connected to the feed end of a rotary kiln.
  • FIG. Ia is a flowchart representation of one process according to the invention, in which slag having a particle size in the range from about 1 mm to about 5 cm and finely ground non-slag raw materials are both introduced into the feed end of a preheater and the output end of the preheater is connected to the feed end of a rotary kiln.
  • Ib is a flowchart representation of another process according to the invention, in which finely ground non-slag raw materials are introduced into the feed end of a preheater and slag having a particle size in the range from about 1 mm to about 5 cm is introduced into the preheater at a point between the feed end and the output end, and the output end of the preheater is connected to the feed end of a rotary kiln.
  • FIG. 2 is a schematic drawing of a rotary cement kiln equipped with a preheater system, into which the cement raw materials, that include slag having a particle size in the range from about 1 mm to about 5 cm, are introduced.
  • FIG. 3 is a schematic drawing of a preheater kiln equipped with at least one conveying device for introducing slag, having a particle size from about 1 mm to about 5 cm into the preheater.
  • FIGS. Ia to 3 of the drawings in which like numerals refer to like parts.
  • the flow charts in Figs. Ia and Ib illustrate two embodiments of the process of the invention.
  • a rotary kiln 130 equipped with a preheater system 105 is used to prepare cement clinker from raw materials.
  • the raw materials include slag that has a particle size in the range from about 1 mm to about 5 cm and finely ground non-slag cement raw materials.
  • both the slag and non-slag components of the cement raw materials are introduced into the feed end of the preheater system.
  • the non-slag portion of the cement raw materials is always added to the feed end of the preheater system.
  • the slag component of the cement raw materials may be introduced into the preheater at any suitable entry port.
  • the finely ground non-slag component may be introduced to the preheater using a variety of different conveying devices, e.g., a mechanical conveying device or a pneumatic conveying device.
  • the slag component of the cement raw materials may be more suitably introduced into the preheater via a mechanical conveying device.
  • both the slag and non-slag components of the feed may be introduced into the feed end of the preheater system via a mechanical conveying device 150, such as a belt conveyer, a screw conveyer or a bucket elevator.
  • a mechanical conveying device 150 such as a belt conveyer, a screw conveyer or a bucket elevator.
  • slag having a particle size in the range from about 1 mm to about 5 cm may be introduced into to the feed end of the preheater system via a mechanical conveying device 150, and the finely ground non-slag component of the cement raw material is introduced into the feed end via a pneumatic conveying device 155.
  • the processed materials move from the preheater system to the feed end 131 of the rotary kiln 130.
  • the slag component of the cement raw materials is introduced into the preheater system 105 via conveying device 160, at a point between the feed end and the output end, and the finely ground non-slag component of the cement raw materials is introduced into the feed end of the preheater system 105, via conveying device 165.
  • both conveying devices 160 and 165 are mechanical conveying devices such as belt conveyers, screw conveyers or bucket elevators.
  • the conveying device 160 that carries the slag is a mechanical conveying device
  • the conveying device 155 that carries the finely ground non-slag component of the cement raw material is a pneumatic conveying device. After processing by the preheater system, the processed materials move to the feed end 131 of the rotary kiln 130.
  • the conveyer may be configured to reduce the amount of air introduced with the cement raw materials.
  • a belt conveyer may be equipped with a double tipping valve.
  • a screw conveyer may be operated in such a way that the screw conveyer, with the conveyed material contained therein provides an effective air seal.
  • FIG. 2 schematically illustrates an embodiment of the process of clinker formation using a preheater kiln 200.
  • the preheater kiln comprises a preheater 205 and a rotary kiln 230.
  • the preheater 205 optionally includes multiple stages.
  • the preheater 205 in Fig. 2 is illustrated as including four stages, Stage 1, 210, Stage 2, 215, Stage 3, 220, and Stage 4, 225.
  • the lowest stage of the preheater, illustrated in Fig. 2 as Stage 1 210, is communicably connected to the feed end 231 of the rotary kiln 230 such that materials processed by the preheater pass from the lowest stage of the preheater into the feed end of the rotary kiln.
  • Finely ground non-slag cement raw materials are introduced into the preheater 205 at the feed end 240, illustrated in Fig. 2 between Stage 3 220 and Stage 4 225.
  • Slag having a particle size in the range from about 1 mm to about 5 cm, is introduced into the preheater at one or more entry points, for example at the feed end 240 or at a point between the feed end and the output end 241 of the preheater 205.
  • both the slag and non-slag components of the cement raw materials are introduced into the feed end 240 of the preheater.
  • the slag component may be introduced into the lowest stage of the preheater 210.
  • Cement raw materials are conveyed to an entry point in the preheater by one or more conveying devices.
  • the raw materials are conveyed to the feed end 240 of the preheater, via a mechanical conveying device 250, such as a belt conveyer, a screw conveyer or a bucket elevator.
  • finely ground cement raw materials, other than slag are conveyed to the feed end 240 of the preheater via a pneumatic conveying device 255, and slag raw materials are conveyed to the feed end 240 of the preheater, via a mechanical conveying device 250.
  • FIG. 3 schematically illustrates an embodiment of the process of clinker formation using a precalciner kiln 300.
  • the precalciner kiln comprises a preheater system 305 and a rotary kiln 330, wherein the preheater system comprises a preheater 306 and a precalciner 335.
  • the preheater 306 optionally includes multiple stages.
  • the preheater 306, as illustrated in Fig. 3, has four stages: Stage 1, 310, Stage 2, 315, Stage 3, 320, and Stage 4, 325.
  • the lowest stage of the preheater illustrated in Fig. 3 as Stage 1 310 is communicably connected to the feed end 331 of the rotary kiln 330 such that materials processed by the preheater system pass from the lowest stage of the preheater into the feed end of the rotary kiln.
  • the precalciner 335 is attached to the lowest stage 310, and is equipped with a precalciner burner 345. Finely ground non-slag cement raw materials are introduced into the preheater at the feed end 340 of the preheater, illustrated in Fig. 3 between Stage 3 320 and Stage 4 325.
  • Slag having a particle size in the range from about 1 mm to about 5 cm, is introduced into the preheater at one or more entry points, for example at the feed end 440 of the preheater or into the precalciner 335.
  • both the slag and non-slag components of the cement raw materials are introduced into the feed end 340 of the preheater.
  • slag having a particle size in the range from about 1 mm to about 5 cm, is introduced into the precalciner 335, and finely ground cement raw materials other than slag are introduced into the feed end 340 of the preheater.
  • Slag that is introduced directly into the precalciner is introduced, for example with the fuel supplying the precalciner burner, or through a separate feed into the precalciner.
  • Cement raw materials are conveyed to the entry points in the preheater system by one or more conveying devices.
  • the raw materials are conveyed to the feed end 340 of the preheater via a mechanical conveying device 350 such as a belt conveyer, a screw conveyer or a bucket elevator.
  • finely ground non-slag cement raw materials are conveyed to the feed end 340 of the preheater via a pneumatic conveying device 355, and slag raw materials are conveyed to the feed end 340 of the preheater, via a mechanical conveying device 350.
  • slag having a particle size in the range from about 1 mm to about 5 cm is introduced via a mechanical conveying device 350a or 350b to the precalciner 335, and finely ground non-slag cement raw materials are introduced into the feed end 340 of the preheater via a pneumatic conveying device 355.
  • the slag is introduced via a mechanical conveying device 350a into the precalciner through a separate feed.
  • the slag is introduced via a mechanical conveying device 350b into the precalciner through the same port used to feed fuel to the precalciner burner.
  • a cement manufacturing apparatus may be equipped with a double string preheater , optionally equipped with a precalciner, wherein one or more of the multiple stages of the preheater include more than one cyclone-type vessel.
  • the slag component of the cement raw materials has a particle size from about 1 mm up to about 5 cm; or from about 1 mm up to about 4 cm; or from about 1 mm up to about 3 cm; or from about 1 mm up to about 2 cm; or from about 1 mm up to about 1 cm.
  • the slag component of the cement raw materials has a particle size from about 5 mm up to about 4 cm; or from about 5 mm up to about 3 cm; or from about 5 mm up to about 2 cm; or from about 5 mm up to about 1 cm.
  • the slag component of the cement raw materials has a particle size up to about 5 cm; or up to about 4 cm; or up to about 3 cm; or up to about 2 cm; or up to about 1 cm.
  • Slag having particle sizes as described herein is produced, for example, by crushing and screening a slag material. No fine grinding, pulverizing or comminution of the slag component of the cement raw material is necessary for the process of the invention.
  • the non-slag component of the cement raw materials is preferably finely ground. Fine grinding of the non-slag component of the cement raw materials may be accomplished by use of a raw mill, e.g., a ball mill or any other method known in the art to produce finely ground cement rat materials.
  • the expression "finely ground” is understood to indicate that the material has the consistency of fine powder, having an average particle size less than about 100 microns. According to an embodiment of the invention the finely ground non-slag component of the cement raw materials has an average particle size less than about 75 microns. According to another embodiment of the invention, about 80% of the finely ground non-slag component of the cement raw materials passes through a 200-mesh screen.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Details (AREA)

Abstract

Procédé de production de clinker de ciment utilisant un four à ciment rotatif avec un système de préchauffage. Le procédé comprend l'introduction de matières premières de ciment dans le système de préchauffage; les matières premières de ciment comprenant du laitier présentant une taille de particule comprise dans une plage d'environ 1 mm à environ 5 cm.
PCT/US2007/068765 2006-06-01 2007-05-11 Procédé de fabrication de clinker de ciment Ceased WO2007143333A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US80994006P 2006-06-01 2006-06-01
US60/809,940 2006-06-01

Publications (1)

Publication Number Publication Date
WO2007143333A1 true WO2007143333A1 (fr) 2007-12-13

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PCT/US2007/068765 Ceased WO2007143333A1 (fr) 2006-06-01 2007-05-11 Procédé de fabrication de clinker de ciment

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3074360A4 (fr) * 2013-11-29 2017-08-23 Calix Ltd Procédé et appareil pour la fabrication de ciment portland
CN110981231A (zh) * 2019-12-27 2020-04-10 湖南省小尹无忌环境能源科技开发有限公司 基于干法旋窑水泥生产线协同处理电解锰渣的设备及方法
WO2023084027A1 (fr) * 2021-11-11 2023-05-19 Khd Humboldt Wedag Gmbh Dispositif de transport pour un système de production de ciment

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504319A (en) * 1982-12-04 1985-03-12 Klockner-Humboldt-Deutz Ag Method and apparatus for burning cement clinker
US5575827A (en) * 1993-02-26 1996-11-19 Blue Circle America, Inc. System for producing cementitious materials from ferrous blast furnace slags
US6264738B1 (en) * 1995-11-03 2001-07-24 Paul Lorke Method of producing cement clinker and associated device
US6491751B1 (en) * 1998-09-18 2002-12-10 Texas Industries, Inc. Method for manufacturing cement using a raw material mix including finely ground steel slag
US6709510B1 (en) * 2002-11-19 2004-03-23 Texas Industries, Inc. Process for using mill scale in cement clinker production

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504319A (en) * 1982-12-04 1985-03-12 Klockner-Humboldt-Deutz Ag Method and apparatus for burning cement clinker
US5575827A (en) * 1993-02-26 1996-11-19 Blue Circle America, Inc. System for producing cementitious materials from ferrous blast furnace slags
US6264738B1 (en) * 1995-11-03 2001-07-24 Paul Lorke Method of producing cement clinker and associated device
US6491751B1 (en) * 1998-09-18 2002-12-10 Texas Industries, Inc. Method for manufacturing cement using a raw material mix including finely ground steel slag
US6709510B1 (en) * 2002-11-19 2004-03-23 Texas Industries, Inc. Process for using mill scale in cement clinker production

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3074360A4 (fr) * 2013-11-29 2017-08-23 Calix Ltd Procédé et appareil pour la fabrication de ciment portland
CN110981231A (zh) * 2019-12-27 2020-04-10 湖南省小尹无忌环境能源科技开发有限公司 基于干法旋窑水泥生产线协同处理电解锰渣的设备及方法
CN110981231B (zh) * 2019-12-27 2024-04-26 湖南省小尹无忌环境能源科技开发有限公司 基于干法旋窑水泥生产线协同处理电解锰渣的设备及方法
WO2023084027A1 (fr) * 2021-11-11 2023-05-19 Khd Humboldt Wedag Gmbh Dispositif de transport pour un système de production de ciment

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